My chastity is permanent and we use the security screw provided for the Jailbird. The tool isn't very useful as a necklace or anklet as is, but reading here I think I've figured out two things we'd like to do with it. Since there are two tools, we could do both. One we'd like to encase in clear polyester casting resin. Something coffee cup sized that would basically be a paperweight. Not certain this material is 100% impenetrable, but grinding it out would probably ruin it. The second method actually results in ruining the tool, but would make a nicer charm. Grinding off the special tip and gold-plating the remaining stub as a charm would also be perfect. Thanks for stirring my brain.